Loto wethbeell



uitrifutrs @sind 'ffirn'j Lenin Ws'rHnnsLL, or "BosfroNj MASSACHUSETTS, ASSIGNQI; cpo"4 HIM; SELFANDJOHN n. WELLS; Y y

Leder@ Patent 62,174, dans Mmm/19, 1367.

IMPROVEMENT In DIES'.-

ro Annwnon 'IirjM'AY ooNcEkN:

Be it known that I, Lorlrn- WErHnnnnL, of, the cityof Boston, in the State o'f Mxsisachusetts, have invented a, certain new and usefullmprovement in Forging; and I do hereby declare. .the following to he a. full and 4cox'- rect description of the samc,ireferen'ce being had `to' `the accompanying drawings, in- VWhich Figure 1 is a vertical central longitudinal section of a pir of dies in the act of forging a riveting hemmen .one of the class of articles. to. thel production of which my improvement is applicable. f

FigurefZ is a perspeetiye view of one of thesedies.

lfigure 3 is a `transverse vertical section .of the saine ;y and v Figure 4 is a perspective view of rthe finished hammer produced by this process.: 'The same partis 'marked `by the sameletterof reference wherever it ccnurst,V

The nutrir-elo? this invention consistsin the use of a or' '-hummer of peculiar dies, suitable `to producearticles which havel heretofore been produced by the turningelathe, viz, articlcshaving such irregularity of` longitudinal contour thrttithe rod or bar of metal from which they are-formed could not'be Vmoved longitudinally in the dies, but could only be rotated on its axis while under the operation of' the himmel'.

` The trip-hammer is for the moist part employed in draining metal to a regular thickness or taper, `or "in forming articles regularly cylindricahnnd, viher'e'dies are used in connection 'with it they nresuch as admittof the free movement longitudinally of 'the rod or bar of metal 'subjeet-edtc their action;V The manufacture of gunbarrcls illustrates this .use'of thohammcr, thej barrel being Fhoth, rotatedonrts airis und drawn longitudinally along thezmvil.l The drop-hitmnier is used vto form articles, ofV irregular forni in dies, but its action i differs in its effect uponfthc metal fromf that of thetiipdlammer liy |reason ofits substitutingonc oritwc heavy blows, given ,at considerable intervals, :for n rapid succession of lighter blows.` The `dies usedlin thedrop` hammer' are quite di'terent from those which .would bc applicable in' the 'trip-hammer. `In the use of dies in` the i drop-hammer most of' the superfluo-.1s stock escapes' at the sides, forming what is called a Bash or thin Msheet' o't metal, which Vadheres to the article "formed, and has to'he removedby trimming, leavinga distinctrnark to `be eliaccd hy grinding and polishing. Inr dies applicuhle' to the trip-hammer, Where articles `are subjected "to numerous and rapid lilou-s, another provision for theremoval of superfluous stock must be runde.` Itnill not be practica-blc to allow it to escape' in a llash, as that would prevent the article freni being turned 'in the dies,`

or the Bosh, having become cool, could not be incorporated into the metal underthe action of thehamnier. It s.thercforc necessary that the surplus s tock,`inst`ad of escaping intliegform of a flash or thin" sheet at the sides of the die, should assu-me there the form of an enlargement or bulge, wh ich, as theimetal is 'consolidated' by'hammering, gradually disappears from that position, and, when the 4dies hav'chiiually been brought together, ,i

shows itself at the ond of thc -nished article, whence it is removed by the chischshears, tile, or. igrindstone.

It will he perceived, therefore, that 'the conditions are quite different in the trip hammer from thosefwhich exist 'in the drop-hummer-a distinction of vital importuncein its relation to the'presentliinvention. The dies used in-thedrop-hanimer would not he capable of usc where the metal acted upon has to be. constantly turnedas it reeeivcsa rapid serios of blows. i The Vdies, heretofore :used in .the trip-hammer (if `they can properlyibe 'called Ydies) would het answer tov produce the class of articles which I aim to make. They are more properly mere c formera, which xo-operate with the ,skillof therworkman in producing a result, hutx do :not' absolutely and independently control it as thedrop-hammer dies do. i The class of articles to which l apply the trip-hammer by means of the dios which are the subject of` the presentcpplication, has hcretofoicheen made byhand labor, assisted by the turning-lathe. The production of these articles by thesekflics results in an enormous economy in labor as well as a great improvement in the quality et" the article menufacturcd In the drawings I'illustraite the inventionin its application to the manufacture of `a riveting hammer. i

makefthe upper, and B 'the lower die; C the `groove, in which a rod of steel is im reduced;` Dthat portion of' the die in which the face of 'the hammer is produced; E an enlarged space in the inicldle'oi` the` die, in which the rnd can turn without being subjectcdto the blow cti-the die; F'the scn|ispherical portion oi' the dic,-in which the roundcrlpnnc of the hemmt-.nie produced; und egroove, into which the surplus stock is forced during the process of the hammering, and where it .s'll appears at the close of theope ration;` The edges-ivres of the I l 2 am impression inthe die are cut away and rounded'o' in the manner shown, for the purpose of 'allowing the 'surplus stock to show itself in elbulge instead of in a fleshl on the principle before alluded to. H marks the square' steel rodifrom the end of which a. hammer has just-been forged; and I the hummer as it ppears when y'the dies ere brought together. Fig. 4 shows the finished article after it has been detached from the rod H and had the surplus metal removed from the end on the grindstone.' I l I Having thus fully described lmy invention, what I claim vtherein .as an improvement lin the art of forging, and desire to secure by Letters Patent, isv A The use in the `trip-hmnmer of dies, constructed1 as described, for the purpose of forging -articles of the description specified. v i i y y `The above specification yof my .seid invention signed and witnessed at Boston this 13th day of August, y A. D. 1866.

LORIN WETHERELL.

Witnesses:

' ,CHAUNCEY Smm, f Cnss. F. STANSBUM.' 

